Place the cranberries in a saucepan and add the sugar.
Add the orange juice zest and juice and stir, and add a little grated nutmeg. Heat gently, stirring until the juices begin to run and the sugar has dissolved.
Allow the sauce to simmer for about 5 to 10 minutes, stirring occasionally until the cranberries are very soft and start to break down.
Pour into a serving bowl and allow to cool.
Notes
This sauce is quite thick, and can be made a little softer by adding 3 tablespoon water along with the orange juice.
Freeze in an airtight container for up to 4 months